Grades Breakdown feature allows the administrator to see the amount of grades given to students by particular teacher in a school. This enables the admin to administer the students performance as subjected by the teacher.
To view the Grades breakdown, go to Grades >> Reports >> Grade Breakdown. List of teachers who have graded will appear with their grading amount for each grade type.
As marked in the screenshot above, here Grade type 'A' is given 81 times including various courses for which the teacher has graded to the students.